Metal-bending machine



(No Model.)

O. G. KNIPB. METAL BENDING MACHINE No. 310,286. Patented Jan. 6, 1885.

A fforney u maps. Phabl-ii-Mgnp ben Washing m o c UNIT D STATES PATENT OFFICE.

I OLIVER C. KNIFE, OF N ORRISTOWN PENNSYLYANIA.

METAL-BENDING MACHINE.

SPECIFICATION forming part of Letters Patent No. 310,286, dated January 6, 1885.

Application filedNoveinber 30, 1853. (No model.)

' I ers skilled in the art to-which it appertains to make and use the same.

My invention relates to an improvement in machines for bending sheet. metal, and more particularly designed for forming metal tubes,

and also for scarfing or beveling the edges of certain forms thereof. for the purpose of welding said edges together; and it consists in certain novel features of construction and combinations of parts, as will be hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view in side elevation of my improvement. Fig. 2 is a'sectional view thereof. Fig. 3 is a similar view of a modified form thereof. Fig.

4 is an end View showing the scarfing device attached to a pair of finishing-rolls. Fig. 5 is an end view of a piece of sheet metal having its edges scarfed or beveled. Fig. 6 is asimilar view of the same after it has passed through the machine shown in Figs. 1 and 2. Fig. 7 is a similar view of a piece of sheet metal after it has passed through the machine shown in Fig. 3.

AA represent upright frame pieces or posts, adapted to support the tables or shelves B, forming a part thereof, and preferablyheld in position by cleats formed in the said posts, thereby allowing the tables to be moved either toward or away from each other, the tables being held at any point of adjustment by any desired means. .0 represents a shaft ournaled in bearings secured to transverse frame-pieces connecting the end posts, A, through which shaft motion is imparted to the machine, and to which are' .secured the eccentrics D. To the said eccentrics are pivotally secured the lower ends of the pitmen E, to the upper ends of which latter are pivotally secured the lower ends of the connecting-rods F, the said pitmen working in sleeve bearings or guidesa in the frame l iece S, secured to the posts A. The upper ends of the connecting-rods F are pivotally secured to the lower ends of the bending or forming jaws G, which latter are also pivoted near their upper ends to a rod or bar, H, running the length of the machine, and having its ends secured in cross-beams connecting the posts A. The upper forming portions of these jaws are preferably formed detachable from the lower portions, as shown by dottedlinesin Fig. 2 of thedrawings. By thus constructing the jaws the upper portion may be removed and substituted by others of different forms or shapes without the necessity of disconnecting or-removing the jaws from their connecting-rods. Between the posts A is supported the mandrel Laround which the forming-jaws are adapted to close, the said mandrel being made in two sections adapted to slide longitudinally in opposite directions, as will be hereinafter described.

J represents an extension consisting of uprights j j and the curved upright j, secured to the posts A, in which extension is journaled a horizontal shaft, K, to which is keyed the cog-wheel L, the teeth of which are adapted to mesh with the teeth M, formed on the under side of the mandrel. In the extension J is also journaled a shaft, N, carrying the fric-.

tion-wheels O, to which shaft is also secured the gear-wheel l.

On each end of the shaft 0 is attached a gearwheel,Q, adapted to mesh with similar wheels, R, secured to short shafts R, journaled in bearings secured to cross-bars connecting the posts A, one of said shafts B being provided on its outer end with a friction-wheel, T, and on the other with a bevel gear-wheel, T, and a friction-wheel, T". One end of the machine is provided with two finishing-rolls, U, se cured to shafts journaled in cross-pieces V, connecting the posts A with the uprights j 'j and are provided on one end with the bevelgears U, gearing with each other, and the upper gear U gearing with the bevel gearwheel '1", between which rolls the sheet metal is made to pass before being placed in position for bending.

In a bracket (not shown) secured to the up- IOO formed on the end of the lower roll U. In the curved uprightj 'is also j ournaled a shaft (not shown) carrying the scarfing-wheel V,

' one end of which is provided with teeth adaptdown, and thereby, through the intervention 'ter is being formed.

of the connecting-rods F, closes the jaws G and metal plate around the mandrel I, the upper ends of the jaws being provided with small rollers X, if desired, to reduce the frietion between the jaws and plate while the lat- After the metal plate has been formed around the mandrel the wheels 0, whose shaft is allowed to slide in its bearings, are forced against the friction-wheel T and thus gearing the wheels P and L, the wheel 'I transmitting the motion of the shaft 0 to the wheels 0, which in turn transmit the motion, through the gears P and L, to the sections of the mandrel I, which are drawn outwardly, and thereby allowing the formed metal to be taken from the machine, the metal having received the shape as shown in Fig. 6. Two friction-wheels are located at each end of the machine and on opposite sides of the wheels T T, and hence by moving one of said friction-wheels O at each end against their respective wheels T T, the mandrels will be moved in one direction, and then by moving the wheels 0 in contact with said wheels Tl away from said wheel,and moving the remaining two wheels 0 into contact therewith, a reverse movement is imparted to the mandrels. In Fig. 3 is shown a modification wherein a series of eccentrics, D D, are secured to the shaft, the eccentric D being fastened a little in advance of the eccentric D.

Y is a frame secured in position by bearings Z, attached to the posts A, to the upper cross-piece of which frame Y is secured the mandrel I, the lower portion of the frame resting on the eccentric D. The forming-jaws in this instance are pivotally secured at points A, the upper portions of the jaws being straight and the lower portions curved, as shown.

To bend metal by this device, it is placed on the table and motion imparted to the shaft 0, as before described. The pitmen E ascend and the points 13 of the jaws G descend, followed by the mandrel I, until the said points have reached theirlowest position and the straight sides of the jaws have almost as sumed a vertical position. The mandrel is then raised by the eccentric D, and the points of the formingjaws continue to' approach each other until the edges of the iron being formed nearly meet, at which time the points 13 B have separated far enough to allow the bent metal to fall through. A reverse motion is then imparted to the shaft 0 and the parts once more brought into position, as shown in Fig. 3, in readiness for another forming.

It is evident that many changes might be resorted to without departing from the spirit of my invention-as, for instance, the frictionwheel T may be secured directly to the end of the-shaft O and the gear-wheels Q and R dispensed with. Again, the mandrels and forming-jaws may bemade in various forms, according to the shape which it is desired to impart to the metal; and again, if desired, the shaft 0 and the eccentrics may be secured in a position above the mandrel. would have it understood that I do not limit myself to the exact construction and arrangement of parts shown and described, but consider myself at liberty to make such slight changes and alterations as fall within the spirit and scope of my invention.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination, with a frame, of ashaft journaled therein, eccentrics journaled to the latter, pivoted forming-jaws indirectly con nected with said eccentrics, a sectional mandrel around which the jaws close, and the gearing, substantially as described, for with drawing the mandrel, all of the above parts combined asset forth.

2. The combination, with a frame, of a sec tional mandrel, pinions and racks for moving the sect-ions of said mandrel in opposite directions, forming-jaws, and the mechanism, substantially as described, for closing the latter around the-mandrel, substantially as and for the purpose described. a

8. The combination, with a frame, of a shaft journaled therein, eccentrics secured to the latter, pivoted jaws indirectly connected to said eccentrics, a sectional mandrel around which the jaws are adapted to close, and the mech anism, substantially as described, for moving the sections of the mandrel either toward or away from each other, substantially as and for the purpose described.

at. The combination, with a frame, of a shaft journaled therein, eccentrics secured to the shaft, pitmen pivotally secured to the latter, forming-jaws connected with said pitmen by pivoted rods, a sectional mandrel around which said jaws are adapted to close, and the gearing, substantially as described, for moving the mandrel.

5. The combination, with a frame, of a shaft journaled therein, eccentrics secured to said shaft, pitmen pivotally secured to the eccentrics, connecting-rods pivotally secured to the pitmen, sectional forming-jaws secured to the said rods, a sectional mandrel around which said jaws are adapted to close, and the gearing, substantially as described, for moving the mandrel, substantially as andfor the purpose set forth.

Hence I 6. The combinatiom'with a frame, of shaft journaled therein, a sectional mandrel loosely secured in said frame and provided with cogteeth, cog-wheels the teeth of which are adapted to mesh with the saidteeth on the mandrel, and the gearing, substantially as described, connecting said cog-wheels with the sections of the mandrel, whereby the latter may be moved either toward or away from each other, substantially as set forth.

7. In a machine for bending metal, the combinatiomwith a sectional mandrel having cogteeth thereon, of cog-wheels meshing with said teeth, the wheels 0, gear-wheels I and T and the friction-wheels T, all of the above parts combined as described.

.8. The combination, with the main frame andits driving-shaft, of the secondary frame, the rolls and scarfing devices, gears connecting the scarfing devices and rolls, and gears 20 ing witnesses.

OLIVER G. KNIFE.

\Vitnessesi JAMES B. HAYES A. ON. KNIPE. 

